Collection
- Abner Osburn, Physician, Papers1
- Abraham Lincoln Collection1
- Account Books2
- Account Ledger and Diary (Upstate New York)2
- Accounts, 19th Century1
- Acker Family Diaries5
- Ackerly Family Papers4
- Adalbert J. Volck Collection of Etchings4
- Adam Empie Papers3
- Adam Finch Collection2
- Addison Family Papers2
- Adele Goodman Clark papers7
- Adin B. Underwood Papers,2
- Administration records collection23
- Admiral John Randolph Tucker Papers3